Dissemination and adoption of bottom-up agriculture to improve soil fertility in Africa: An interdisciplinary approach

Soil fertility is at stake at a global scale, putting pressure on food security, poverty alleviation and environmental protection, under scenarios of climate change that in most cases aggravate the threat. In sub-Saharan Africa, a combination of depleted soils and population growth adds particular pressure to smallholder farmers and society. Their capacity to innovate in a social, economic, political and cultural context is seen as decisive to reverse the trend of declining soil fertility. However, many technologies with a potential to protect, maintain and build up soil fertility are hardly used by small-scale farmers, triggering the urgent question on their reasoning not to do so. Exploring and understanding the constraints and complexity of the social systems interacting with the implied institutional dynamics are essential steps in designing appropriate agricultural innovations that are scalable and adoptable. The focus of the inter- and transdisciplinary approach applied in the project ORM4Soil (Organic Resource Management for Soil Fertility; www.orm4soil.net) lies at the heart of this project. We are combining qualitative and quantitative methods from agronomy, sociology and communication sciences in order to bring soil-fertility-enhancing-technologies and their adoption to the center of the decision-making process of farmers’ as well as local and regional institutions. At local and regional innovation platforms, stakeholders from business, government, academia and farmer organizations are discussing the outcomes of agronomic trials and sociological research. We are expecting to create bridges between the needs and concerns of farmers, relevant segments of society and policymaking, with the new common goal to enhance soil fertility

Audience research in media development : overview, case studies, and lessons learned

This publication takes a look at current developments in the field of audience research in media development and presents three case studies testing innovative methods that can be of use for research, monitoring, and evaluation. They are meant as an orientation and inspirational source for future projects in this domain. Based on the information assembled in this study we make the case that media development needs audience research to improve its projects. Media development actors need to know more about the impact on their final beneficiaries if they want their work to be truly successful

Von der Volksgemeinschaft zur Re-Vergemeinschaftung in der Krise des Fordismus: - Überlegungen zum Verhältnis von Gemeinschaft und Gesellschaft in der deutschen Geschichte -

Die »Volksgemeinschaft« des Dritten Reiches hat sich in die Gründungsphase der BRD hinühergerettet und bildete die Grundlage für die Wiederaufbauphase. Der westdeutsche Fordismus untergrub und zerstörte die tradierten Formen von Gemeinschaft. Mit der Erosion der Säulen des sozialdemokratischen Wohlfahrtsstaates zeichnet sich jedoch eine »Re-Vergemeinschaftung« ab, der sich, wenn auch mit unterschiedlichen Intentionen, sowohl Teile der sozialen Bewegungen, als auch konservative Suhsidiaritätsapologeten und moderne Managementstrategen verschrieben haben. Diese heterogene Allianz unterminiert aufelärerische Kritik und trägt das neue Modernisierungsprojekt des Kapitalismus: Modernisierung des Kapitalismus durch »Re-Vergemeinschaftung«

The Dark Triad and competitive psychological climate at work: A model of reciprocal relationships in dependence of age and organization change

Integrating an interactionist model of personality development, the cumulative continuity model of personality development, and selection–evocation–manipulation theory, the present study analysed reciprocal relations of the Dark Triad common core and its sub-traits of narcissism, psychopathy, and Machiavellianism with competitive psychological climate. Moreover, within a large (N = 1,185) and longitudinal sample of employees from Germany, latent cross-lagged panel analyses were applied to analyse the moderating roles of age and organization change (i.e., organizational turnover). Overall, results revealed positive reciprocal relations between the Dark Triad common core, its sub-traits, and competitive psychological climate. The Dark Triad common core and Machiavellianism were more stable within the older (50–59 years) compared to the younger (25–34 years) age group. However, we found no age differences for the relation between competitive psychological climate and change in the Dark Triad common core or its sub-traits. Among employees who changed organizations, the Dark Triad common core, narcissism, and psychopathy were more strongly positively related to the change in competitive psychological climate than in the non-change group. This suggests stronger selection compared to evocation–manipulation effects for individuals with high values in the Dark Triad common core, narcissism, and psychopathy, but not for Machiavellianism

Eddy genesis and manipulation in plane laminar shear flow

Eddy formation and presence in a plane laminar shear flow configuration consisting of two infinitely long plates orientated parallel to each other is investigated theoretically. The upper plate, which is planar, drives the flow; the lower one has a sinusoidal profile and is fixed. The governing equations are solved via a full finite element formulation for the general case and semi-analytically at the Stokes flow limit. The effects of varying geometry (involving changes in the mean plate separation or the amplitude and wavelength of the lower plate) and inertia are explored separately. For Stokes flow and varying geometry, excellent agreement between the two methods of solution is found. Of particular interest with regard to the flow structure is the importance of the clearance that exists between the upper plate and the tops of the corrugations forming the lower one. When the clearance is large, an eddy is only present at sufficiently large amplitudes or small wavelengths. However, as the plate clearance is reduced, a critical value is found which triggers the formation of an eddy in an otherwise fully attached flow for any finite amplitude and arbitrarily large wavelength. This is a precursor to the primary eddy to be expected in the lid-driven cavity flow which is formed in the limit of zero clearance between the plates. The influence of the flow driving mechanism is assessed by comparison with corresponding solutions for the case of gravity-driven fluid films flowing over an undulating substrate. When inertia is present, the flow generally becomes asymmetrical. However, it is found that for large mean plate separations the flow local to the lower plate becomes effectively decoupled from the inertia dominated overlying flow if the wavelength of the lower plate is sufficiently small. In such cases the local flow retains its symmetry. A local Reynolds number based on the wavelength is shown to be useful in characterising these large-gap flows. As the mean plate separation is reduced, the form of the asymmetry caused by inertia changes, and becomes strongly dependent on the plate separation. For lower plate wavelengths which do not exhibit a cinematically induced secondary eddy, an inertially induced secondary eddy can be created if the mean plate separation is sufficiently small and the global Reynolds number sufficiently large

Moderating role of LMX and proactive coping in the relationship between learning value of the job and employability enhancement among academic staff employees

Purpose Building upon a competence-based employability model and a social exchange and proactive perspective, the purpose of this paper is to investigate the relationship between learning value of the job and employability among academic staff employees. Moreover, this study also examined whether this relationship was moderated by leader-member exchange (LMX) and a proactive coping style. Design/methodology/approach An online self-report questionnaire with thoroughly validated measures was distributed among academic staff employees (n=139). Findings The results partially supported the specific study assumptions. Concrete, learning value of the job was positively related to anticipation and optimization, corporate sense and balance. LMX moderated the relationship between learning value of the job, on the one hand, and all employability dimensions, on the other hand. However, proactive coping only moderated the relationship with anticipation and optimization, flexibility and balance. In all cases, under the condition of high moderator variable levels, the relationship became stronger. Originality/value This study extends past employability research by applying an interactionist perspective (person: proactive coping style, context: LMX and learning value of the job) approach for explaining employability enhancement. The results of this scholarly work provide useful insights for stimulating future career development and growth, which is of upmost importance in nowadays' labor markets

Psychosocial and Career Support from Different Types of Role-Multiplexity in Developmental Relationships

Related to role theory’s expansion approach, this study focused on how various social roles in one focal person-network member relationship (i.e., multiplexity) relate to the amount of psychosocial and career support. We expected different types of multiplex relationships in comparison to simplex relationships to be positively associated with the support received by the focal person. Via multilevel analysis in M plus, 2995 dyadic relationships of developmental networks nested in 533 persons were analysed. Concerning psychosocial support, a positive association with multiplex relationships from the non-work context, and the combination of work and non-work context could be observed. Multiplex relationships from the work context and multiplex relationships from the work and non-work context were positively associated with career support

Studying Flow Close to an Interface by Total Internal Reflection Fluorescence Cross Correlation Spectroscopy: Quantitative Data Analysis

Total Internal Reflection Fluorescence Cross Correlation Spectroscopy (TIR-FCCS) has recently (S. Yordanov et al., Optics Express 17, 21149 (2009)) been established as an experimental method to probe hydrodynamic flows near surfaces, on length scales of tens of nanometers. Its main advantage is that fluorescence only occurs for tracer particles close to the surface, thus resulting in high sensitivity. However, the measured correlation functions only provide rather indirect information about the flow parameters of interest, such as the shear rate and the slip length. In the present paper, we show how to combine detailed and fairly realistic theoretical modeling of the phenomena by Brownian Dynamics simulations with accurate measurements of the correlation functions, in order to establish a quantitative method to retrieve the flow properties from the experiments. Firstly, Brownian Dynamics is used to sample highly accurate correlation functions for a fixed set of model parameters. Secondly, these parameters are varied systematically by means of an importance-sampling Monte Carlo procedure in order to fit the experiments. This provides the optimum parameter values together with their statistical error bars. The approach is well suited for massively parallel computers, which allows us to do the data analysis within moderate computing times. The method is applied to flow near a hydrophilic surface, where the slip length is observed to be smaller than 10nm, and, within the limitations of the experiments and the model, indistinguishable from zero.Comment: 18 pages, 12 figure